Jack



L. A. ANDERSON.

JACK.

APPLICATION EILED MAR. 1. 1920.

Patend Aug, 2, 1921.

UNITED STATES PATENT OFFICE.

LONARD A. ANDERSON, OF,LOS ANGELES, CALIFORNIA, ASSIGNOB OF ONE-HALF T0 ROSCOE MOSS, OF LOS ANGELES, CALIFORNIA.

JACK.

Specification of Letters Patent.

Patented Aug. 2, 1921.

Application filed March 1, 1920. Serial No. 362,607.

T0 aZZ w7wm 7t may concern:

Be it known that I, LONARD A. ANDER- SON, a citizen of the United States, residing at Los Angeles, Los Angeles county, and State of California, have invented a new and useful Improvement Comprising the Jack disclosed in the following specification.

My invention relates to the art of drilling wells and the principal object of the invention is to provide means for unscrewing and screwing up the tool joints used in drilling.

Fnrther objects and advantages Will be made evident hereinafter.

Referring to the drawings which are for illustrative purposes only, Figure 1 is a plan view of my invention showing the method of operation.

Fig. 2 is a section on a plane represented by the line 22 Fig. 1.

Fig. 3 is a section on a plane represented by the line 3-3 of Fig. 2.

Fig. 4 is an enlarged view of the tool joints with the wrenches shown in place thereon.

In the form of the invention illustrated in the drawings, the jack is shown applied to wrenches 11 and 12, operating tool joints 14 and 15. The jack consists of a frame 20 in which a cylinder 21 is free to slide; this cylinder having a movable chock 22 rigidly secured thereto. A piston 23 is rigidly secured to a piston rod 24 which in turn is secured by means of a nui: 25 in the frame 20.

Flexible hose 26 and 27 fecl with fluid through a four way valve 28 from a supply hose 29 is also provided, the hose 26 being connected into one end of the cylinder 21 and the hose 27 being connected into the other end. A bar 30 having serrations 31 in the top thereof is secured in the frame 20, and a movable check 40 slides thereon, this chock being provided with a dog 41 for engaging the serrations 31.

The method of operation is as follows:

The wrenches 11 and 12 being placed on the square shanks 50 of the tool joints 14 and 15, the handles of these wrenches are carried over and seated on the chocks 22 and 4.0. If now fiuid pressure 'is admitted through the hose 27, the cylinder 21 moves in the frame 20 forcing the chock 22 toward the chock 40 and exerting pressure on the wrenches 11 and 12, these wrenches being forced together,

The same type of movement is used both in screwing up and unscrewing the tool joints 11 and 15, the wrenches being transposed on the tool joint t0 accomplish the desired result, that is to say, if the wrench 11 is on the lower tool joint 15, the tool joint wonld be unscrewed whereas if the wrench is placed on the upper tool joint 14:, the tool joints will be screwed together. The dog 41 is provided so that the ch0ck 40 can be moved up nntil the wrench 12 is tight against the chock 40.

ciaim as my invention 1. A jack for tool joints comprising a f1amc; a chock for receiving a wrench handle; means for securing said chock to said frame; a movable chock for receiving a wrench handle; a cylinder; a piston in said cylinder; means for securing said piston to said frame; and mcans for securing said cylinder to said movable check.

2. A jack for tool joints comprising a check for receivinp; a wrench handlc: means for semrinp; said chock at any one of several positions in said frame; a movable chock for receiving a wrench handle; a cylinder; a piston in said cylinder; means for securing said piston to said trame; and means for secnring said cylinder to said movable chock.

3. A jack for tool joints comprising a frame, a cylinder monntcd to slide freely in said frame, a movable chock rigidly attached to said cylinder. a piston in said cylinder, a piston rod rigidly connecting said piston with said frame, a bar rigidly secured to said frame, serrations formed on said bar, an adjnstable chock sliding freely on said bar, a dog pivoted in said check and engaging said serrations, a four way valve, flexible hose connecting either end of said cylinder with said four way valve, and means for supplving flnid pressure to said valve.

1. A jack for tool joints comprising a frame, a cylinder mounted t0 slide freelyin said frame, a movable chock rigidly attached to said cvlinder. a piston in said cylinder, a piston rod rigidlv connecting said piston with said frame, a bar rigidl secured to said fra1ne, serrations formed on said bar, an adjustable ch0ck sliding freely on said bar, a dog pivoted in said check and engaging said serrations, and means for supplying finid pressure to either end of said cylinder.

5. A jack for tool joints comprising a frame, a cylinder mounted t0 slide freely in justable check to said trame in any one of' said trame, movable check rigidly attached to said cylindcr, a piston in said cylindcr, a piston red rigidl v cennecting said piston with said frame, an adjustable check sliding on said trame, means for securing said adseveral positions, a four way valve, flexible hose cennecting either end. of said cylinder with said four vva v valve, and means for supplying fiuid pressure to said valve.

6. A. jack fer toel joints comprising a frame, a cylindcr mennted te slide freely in said trame, a mevablc check rigidly attached te said cylinder, a piston in said cylindcr, a piston rod rigidly cennecting said piston with said trame, an adjustablc check slidin en said iramc, means for securing said.adjustablc check to said trame in any one of several positions, and means for supplyng fluid pressure to either end ef said cylindcr.

7. A ac'k fer toel joints comprising a trame, a check movable with relation to said frame, a cylinder, a piston in said 'cylindcr, means by which a -force excrtcd betwecn Said piston and said cylinder is applied betvvecn said movable check and said trame, a bar rigidly secured to said trane, serraticns fermed on said bar, an adjmstable check sliding f1ecly on saidbar, a dog piveted in said check and cngagng said scrrztiens, a four way valve, flexible hosc cennecting cithcr end of said cylindcr with said four Way valve, and means for supplying flnid pres sure to said valve.

8. A jack fer toel joints cemprising a frame, a check movable with relation to said framc, a cylindcr, a piston in said cylindcr,

means by which a force exerted betwecn said piston and said cylinder is applied betwecn said mevablc check and said trame, a bar rigidly secured to said trame, serrations formed en said bar, an adjustable check sliding freely on said bar, a deg piveted in said check and engaging said serrations, and means for supplying fiuid pressure to either end cf said cylinder.

9. A jack -fer cool joints comprising a trame, a check mevable with relation te said trame, a cylinder, a piston in said cylindcr, means by which a force excrted betwecn said piston and said cylindcr is applied bemvcen said mevablc check and said frame, an adj ustable check sliding on said trame, means for securing said adjustable check to said trame in any one of scveral positions, a four way valve, flexible hose connecting either cnd et said cylinder Wibh said four way valve, and means for supplying flnid pressure to said valve.

10. A jack for teel joints cemprising a trame, a check movablc with relation to said frame, a cylinder, piston in said cylinder, incans by which a ferceexertcd between said piston and said cylindcr is applied between said movable check and said frame, an adjustable check sliding on said frame, means for secnring said adjustable check to said irane inany ene of several positions, and 1ncans for supplying fiuid pressure te eithgr cm1. et said cylinder.

in testimenv whcreef, I have hercunte set my hand at Les 'Angeles, California, this 18th dey et February 1920.

LONARD A. ANDERSON. 

